Examine(Will help U in giving No of occurances of an Alphabet or No in a particular string and To find length,U can Replace or Delete a particular Word in string and also to find position ) , Compress( To compress the More than two Strings into one)

This is one of the weaknesses of NATURAL - It doesn't have string manipulation functions like in REXX or VB.
EXAMINE, EXAMINE TRANSLATE, COMPRESS, SEPARATE & MOVE SUBSTRING are the most you can get. Also, you have the MASK & PATTERN options of IF.